CN102828898B - Wind turbine blade - Google Patents

Wind turbine blade Download PDF

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Publication number
CN102828898B
CN102828898B CN201210199523.4A CN201210199523A CN102828898B CN 102828898 B CN102828898 B CN 102828898B CN 201210199523 A CN201210199523 A CN 201210199523A CN 102828898 B CN102828898 B CN 102828898B
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CN
China
Prior art keywords
pitching
bolt
ring
blade
group
Prior art date
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Active
Application number
CN201210199523.4A
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Chinese (zh)
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CN102828898A (en
Inventor
P·格雷伯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Envision Energy Jiangsu Co Ltd
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Envision Energy Denmark ApS
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Publication of CN102828898A publication Critical patent/CN102828898A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • F03D7/0228—Adjusting blade pitch of the blade tips only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/302—Segmented or sectional blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79—Bearing, support or actuation arrangements therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

A wind turbine blade is described having a pitch system coupling which is adapted to allow fasteners, such as bolts, of such a coupling to be tightened from the inside of the blade. This removes the need for relatively difficult and expensive external maintenance operations to tighten pitch coupling bolts. The coupling is arranged to present first and second internal bearing surfaces, against which the bolts of the pitch coupling can be tightened. The coupling may comprise a shaped end portion of an inner blade section, and/or the pitch system may comprise an additional bolting collar to facilitate this arrangement.

Description

Wind turbine blade
Technical field
The present invention relates to inner blade section and siphonal lobe fragment system for rotating fixing to partial pitch wind turbine blade, particularly bolt connecting mode is fixing.
Background technique
In some wind turbine blade layout, expecting can the some or all of wind turbine blade main body of pitching, runs to control wind turbine.This pitching realizes by using system for rotating, and this system for rotating is located between the turbo machine fragment of expectation pitching.
See Fig. 1, connect the one exemplary embodiment of the transverse section of the system for rotating be arranged in wind turbine blade, represent with 50.The side of the transverse section of system for rotating 50 is only shown in Fig. 1.Be understandable that, whole system for rotating 50 is in complete circumferentially extension, and forming between contiguous blade sections can the connection of pitching.
System for rotating 50 comprises the first and second concentric pitching rings (pitch ring) 52,54, and this pitching ring 52,54 is coupled to each other by least one bearing runway 56.First pitching ring 52 is outer pitching rings, and it has the diameter larger than the second pitching ring 54, and this second pitching ring 54 is positioned within the first pitching ring 52 circumference.Bearing in runway 56 allows the first pitching ring 52 of system for rotating to rotate relative to the second pitching ring 54.
In Fig. 1, the first pitching ring 52 is attached to the first blade sections 58; Bolt 60 extends through the first pitching ring 52, and is firmly placed in the end of the first blade sections 58; Nut 62 is applied to the free end of bolt 60, with fastening against the bottom end surface on the first pitching ring 52 and the first blade sections 58.Similarly, the second pitching ring 54 is attached to the second blade sections 64; Bolt 66 extends through the second pitching ring 54, and is placed in the end of the second blade sections 64 securely; Nut 68 is applied to the free end of bolt 66, with fastening against the bottom end surface on the second pitching ring 54 and the second blade sections 64.Therefore, the second blade sections 64 can relative to the rotating pitching of the first blade sections 58.
Owing to only illustrating the side of the cross section of system for rotating 50 in Fig. 1, therefore, be understandable that, multiple bolt 60,66 and nut 62,68 are arranged around the circumference of system for rotating 50.
As the result of the described structure of system for rotating 50, one group of nuts and bolt in multiple nuts and bolt is positioned at blade exterior---and in this case, be first group of nuts and bolt 60,62.This structure is standard arrangement (wherein, pitching is located on the butt of rotor blade) for the wind turbine rotor blade of complete pitching, such as U.S. Patent No. 6,783, and seen in 326.Similarly, the layout of one group of screw bolt and nut in wind turbine blade outside also for partial pitch rotor blade, wherein, on the longitude of the whole rotor blade of system for rotating between the first blade sections and the second blade sections a bit on.
But a problem of this layout is, the bolted maintenance of the first pitching ring 52, need at tram access outer foil, to make workman carry out suitable housekeeping operation, such as, clamping bolt connects.Must fix due to blade rotation and stop safely, this outer foil access causes considerable maintenance time and cost.Further, when partial pitch turbo machine, when safeguarding, door frame or lifting lifting platform must be located at the position of the pitching connection bit of blades adjacent.When offshore turbo machine, be subject to the factor impacts such as the delay that weather causes due to the operation of any external maintenance, this housekeeping operation needs extra cost.Owing to regularly must carry out housekeeping operation within the spreadable life of wind turbine, as bolton, for wind turbine, the cost that this housekeeping operation relates to is quite high operating cost.
International patent application WO2005/019642, discloses a kind of wind turbine blade system for rotating, and the rotating blade being installed on wheel hub is shown.Link between blade and wheel hub is made by pitching drive plate.This drive plate is installed on blade by the bolt extending into blade.Be provided with other bolt system between wheel hub and drive plate, these bolt system extend through drive plate and wheel hub wall.The disclosure text also comprises the embodiment of the system for rotating between two parts of blade.But how fastening do not provide these bolts is information.Equally, international patent application WO2011/056121 discloses a kind of wind turbine being provided with system for rotating between two parts of blade.Wherein this system for rotating comprises the inner ring being attached to rotatable outer shroud.Openly to this application intra vane parts and outer leafs parts how to be connected to two rings respectively.
European patent application EP 1741940 discloses a kind of wind turbine, and it has system for rotating between rotor hub and wind turbine blade, and wherein at least one group of bolt can access from the outside of wind turbine blade.In another embodiment, screw bolt and nut all can access from outside.In this technological scheme, wind turbine blade is fixed to system for rotating by interior tightening action and outer tightening action.
The object of the invention is the system improving prior art.Especially, object is to provide a kind of wind turbine blade, can overcome the problem of above-mentioned summary, and causes the maintenance cost of being correlated with to reduce.
Summary of the invention
This object is realized by a kind of method, wherein, the inside and outside blade sections of partial pitch wind turbine blade is secured to one another by tightening action through system for rotating, this tightening action only carries out from blade interior, at least 35 meters, usual blade is long, wherein, this blade has the blade body of general hollow.Relevant system for rotating is located between inside and outside blade sections, and inner blade section is fastened to system for rotating by tightening action, and this tightening action only carries out from blade interior, such as, from the inside of inner blade section.Similarly, siphonal lobe fragment is fastened to system for rotating by tightening action, and this tightening action also only carries out from blade interior.
Preferably, a kind of blade and method comprise following detailed structure detail and step.There is provided a kind of partial pitch wind turbine blade, its system for rotating having general hollow main body, inner blade section, siphonal lobe fragment and be located between inside and outside blade sections, this system for rotating is used for relative to inner blade section pitching siphonal lobe fragment.System for rotating comprises the first and second pitching rings (pitchrings), and the second pitching ring can rotate relative to the first pitching ring.Inner blade section comprises root end and the first pitching end; First pitching end is set, is attached to the first pitching ring by first group of multiple fastening piece; First group of multiple fastening piece has the first device for fixing first group of fastening piece, arranges this first device, makes only the fixing of first device that the first pitching end is fastened to the first pitching ring; First device only from the access of wind turbine blade inside, and can be set to, and by only inner and next from wind turbine blade first device, inner blade section is fastened to the first pitching ring.Siphonal lobe fragment comprises the second pitching end and tip; Second pitching end is set, to be attached to the second pitching ring of system for rotating by second group of multiple fastening piece; Second group of multiple fastening piece has the second device for fastening second group of fastening piece, arranges the second device, makes the fixing of the second device that the second pitching end is fastened to the second pitching ring; Wherein, the second device only can access from the inside of wind turbine blade.The method comprises: by fixing described second device, the second pitching end is fastened to the second pitching ring, described second device only accesses from the inside of described wind turbine blade.Further, the method comprises: by fixing described first device, the first pitching end is fastened to the first pitching ring, described first device only accesses from the inside of described wind turbine blade.
Therefore, once inside and outside blade sections and system for rotating fastening piece fastening, produce appropriate contact, then do not need to carry out tightening action from blade exterior.
In this situation, term " is fixed " and is meaned only from the fixing action that blade body inside is carried out.Such as, term " is fixed " and is meant to nut or without nut, against surperficial clamping bolt.
Typically, first group of multiple fastening piece comprises multiple first bolt and the first nut, and wherein, first device is the first nut combined with bolt.Normally, bolt has externally threaded straight shape parts, and an end of bolt is secured to blade sections, and another end is fixed by nut.Selectively, fastening piece comprises the bolt with bolt head, is bolt head for fastening device, and this bolt head needs by suitable machine turns, to be fixed in the female screw hole of corresponding tool by the bolt with bolt head by rotational action.Correspondingly, second group of multiple fastening piece comprises the second bolt and the second nut, and the second device is the second nut.
Such as, the first pitching end comprises the clutch shaft bearing surface on the inside of inner blade section, and wherein, clutch shaft bearing surface nestles up the first pitching ring, is fastened to the first pitching ring by the first fastening piece.Possibly, the first pitching end has inward flange, and this inward flange comprises clutch shaft bearing surface, and the first pitching ring of system for rotating is fastened to the clutch shaft bearing surface of this inward flange by first group of multiple fastening piece.
When fastening piece is screw bolt and nut, selectively, the first bolt extends through the first pitching ring and enters the first pitching end.Under this mode, first device can be located at the relative both sides of the first pitching ring subsequently with clutch shaft bearing surface.Such as, inward flange comprises multiple blind hole, and blind hole extends into the wind turbine blade main body of flange from the clutch shaft bearing surface of inward flange, and wherein, first group of multiple bolt extends through the first pitching ring and enter blind hole.
In some embodiments, provide the partial pitch wind turbine blade with general hollow main body, this blade comprises:
Have the system for rotating of the first and second pitching rings, the second pitching ring can rotate relative to the first pitching ring;
Have the inner blade section of root end and pitching end, the pitching end of inner blade section passes through the first pitching ring of first group of multiple Bolt Connection to system for rotating; With
Have pitching end and most advanced and sophisticated siphonal lobe fragment, the pitching end of siphonal lobe fragment is by second group of Bolt Connection to the second pitching ring of system for rotating, and siphonal lobe fragment can relative to inner blade section pitching,
Wherein, blade present be located on blade body inside clutch shaft bearing surface and the second bearing surface, blade is set, first end of the first end of first group of multiple bolt and second group of multiple bolt is all accessed from the inside of wind turbine blade, wherein, first group of multiple bolt can be fastening against clutch shaft bearing surface, and second group of multiple bolt can be fastening against the second bearing surface, makes first and second groups of multiple bolts can be fastening from wind turbine blade body interior.
Because bolt can be fastening from blade interior, do not need the tightening operation (such as, for operator provides door frame in blade exterior, to locate at pitching connection bit place) carrying out relative complex in blade exterior.By the first end of the multiple bolt of application Tightening moment to the first group and the first end of second group of multiple bolt, by the appropriate position of bolton in blade, this Tightening moment applies from the inside of blade body.This tightening action, by tightening nut or the rotating bolt head of end, carries out at end, makes bolt head fastening against surface.
Bearing surface can be understood as, and refers to the surface of blade assembly, and bolt can be fastening against this surface.Be understandable that, bolt can be directly fastening against this surface, or fastening against the surface of the element being clamped in this bearing surface, and such as, pitching ring, therefore, fastening force is passed to bottom bearing surface by this element.Because bearing surface is located at blade interior, this allows to carry out inner tightening operation.
Preferably, the pitching end of inner blade section is shaped to, and presents clutch shaft bearing surface, and the end of first group of multiple bolt is fastening against this clutch shaft bearing surface, such as, use nut or bolt head fastening.
Inner blade section, it generally includes outer surface, and one group of bolt is fastening against this outer surface, and this inner blade section is shaping especially, makes the fastening end of bolt be positioned blade body inside.
Preferably, inner blade section comprises the inward flange of the pitching end being located at inner blade section, and wherein, the first pitching ring of system for rotating is bolted to inward flange.
Bolt is set, makes them from blade interior, fastening against inward flange, or fastening against the pitching ring being mounted to flange.
Such as, the internal surface from inner blade section main body that flange is at a right angle protrudes, towards the center longitudinal axis of inner blade section.
Advantageously, clutch shaft bearing surface normal is in the longitudinal axis of inner blade section.
Selectively, blade comprises multiple blind hole be located in inward flange, and blind hole extends into the wind turbine body of flange from the inner bearing surface of inward flange.First group of multiple bolt extends through the first pitching ring and enters blind hole, and wherein, first group of multiple bolt is used for fastening against the first pitching ring, the first pitching ring to be fixed to the inner bearing surface of inward flange.
In this embodiment, the fastening end of system for rotating and bolt is all located at the inside of inner blade section, and system for rotating is mounted to the inner bearing surface of flange.Here, system for rotating can upwards drive, and through the inside of inner blade section, to be arranged on this position, or system for rotating can be set to some parts (the pitching end with by inner blade section).
Under this situation, bolt can comprise anchor pole section, so that will the appropriate position in flange be bolted to, and comprise nut or other suitable elements further, this element can adjust on the thread section of bolt, make it fastening against pitching ring, to be fixed between nut and the inner bearing surface of flange by pitching ring.Preferably, inner bearing surface is the surface of flange, and the pitching tail end of inner blade section is located on this surface, faces the root end of inner blade section.
Below, some alternative technological schemes are described.
In first alternative embodiment, blade comprises multiple penetration hole be located in inward flange, this penetration hole extends to the outer surface of inward flange from the inner bearing surface of inward flange, wherein, first group of multiple bolt extends through penetration hole and the first pitching ring of inward flange, so that the first pitching ring is mounted to inward flange, make the end of first group of multiple bolt fastening against the inner bearing surface of inward flange, so that the first pitching ring is fixed to inward flange.
This embodiment covers pitching ring and the combined bolt of nuts and bolt can be used to be connected to the situation of each side of flange.Pitching ring can be mounted to the inner bearing surface of flange, or is mounted to the outer surface (namely, flange is away from the surface of inner blade section heel piece section) of flange.
Multiple bolt can comprise multiple bolt connection part, for inside and outside blade sections is fixed to system for rotating.Bolt can comprise bolt head, is preferably located at the outer surface side of bolt connection part, and is located at the screw section of interior surface side of bolt connection part, bolt is set, to connect with corresponding adjustable nut, this nut is located on screw section, with by bolton in appropriate position.Bolt head is set, makes them against outer surface self-retaining, to prevent any tightening action come from outside.
Especially, first end of first group of multiple bolt is set to connect with corresponding first group of multiple nut, wherein, first group of multiple nut is used for supporting against the internal surface of inward flange, so that the first pitching ring is fixed to inward flange, wherein, first group of multiple nut can be fastening from the inside of wind turbine blade.
In embodiment alternative further, inner blade section comes to a point at pitching end, to provide tilt internal wall at pitching end, wherein, first pitching ring is mounted to the end surface of the wind turbine blade main body of the general hollow of the pitching tail end of inner blade section, wherein, first group of multiple bolt is applicable to, fastening against this tilt internal wall.
In this embodiment, inner blade section comprises relatively narrow pitching end.End surface is the surface of inner blade section main body, and this surface faces the longitudinal axis along blade sections away from the direction of the root end of blade sections.
Selectively, blade comprises bolt sleeve further, this bolt sleeve has the cross section of approximate wedge shape, this cross section has inclined surface, and wherein, the inclined surface of bolt sleeve is applicable to, near the tilt internal wall of the pitching end of inner blade section, wherein, bolt sleeve presents smooth inner bearing surface, and the end of first group of multiple bolt can be fastening against this bearing surface.
This embodiment uses wedge sleeve, allows the internal surface of the inclination of pitching tail end bolt being fixed to inner blade section.
Bolt sleeve can be set to some fragments (making sleeve pipe easily placement positioning in the end of blade sections).Further feature includes but not limited to following any suitable combination: wherein, and the pitching end of siphonal lobe fragment is shaped to relatively narrow diameter; Wherein, the diameter of the pitching end of inner blade section and first (or outer) pitching ring of system for rotating is roughly equal; Wherein, second (or interior) pitching ring is mounted to the end surface of the pitching end of siphonal lobe fragment; Wherein, preferably, the pitching end of siphonal lobe fragment is narrower than the pitching end of inner blade section; Wherein, the first and second pitching rings are concentric, and the first pitching ring has the diameter larger than the second pitching ring.
In further selectable embodiment, system for rotating comprises the circular bolt sleeve protruded from the first pitching ring, this circular bolt sleeve is applicable to the pitching end connecting intra vane, wherein, circular bolt sleeve presents inside pipe casing bearing surface, first group of bolt is set, fastening against inside pipe casing bearing surface, the first pitching ring to be fixed to the pitching end of inner blade section.
In this embodiment, system for rotating is applicable to provide the suitable bearing surface for bolt, and this bearing surface is positioned at the inside of whole blade, makes all bolts at pitching connection bit place fastening from the inside of blade.
Such as, blade comprises at least one connection being located at the pitching end of inner blade section and protrudes, circular bolt sleeve is set to connect with at least one to protrude connect, wherein, first group of multiple bolt is set to, extend through circular bolt sleeve and at least one connection protrusion, form bolt connection part, the first pitching ring to be fixed to the pitching end of inner blade section.
By applicable system for rotating, for bolt provides the bearing surface of change, system of the present invention can be implemented in the partial pitch blade of standard, for the design of existing blade sections, does not need to do obvious change.
Connect and protrude and can protrude from the end surface of the pitching tail end of inner blade section, circular bolt sleeve can be set, to mate in the diameter connecting protrusion setting.Alternately, circular bolt sleeve can have at least one hole, and this hole is limited to the surface of circular bolt sleeve, and protrude with at least one connection accommodating, vice versa.
Be understandable that, further a succession of hole can be limited to circular bolt sleeve and neutralize at least one connection protrusion place, when inner blade section is attached to the first pitching ring, this some holes is aimed at, present penetration hole or blind hole, with accommodating first group of multiple bolt, thus pitching ring is fixed to blade sections.
In alternative embodiment, circular bolt sleeve can be arranged on around at least one diameter connecting protrusion setting, and at least one connection protrusion presents inner bearing surface subsequently, and first group of multiple bolt is fastening against this bearing surface.
Selectively, use first group of multiple bolt, present the bolt connection part of cross bolt type in this structure, namely, wherein, the bolt axis of first group of multiple bolt is orthogonal to the longitudinal axis of blade.This presents orthogonal bolt and arranges, and wherein, system for rotating is attached to second group of bolt of siphonal lobe fragment, has the bolt axis being roughly parallel to the blade center longitudinal axis.First group of bolt is set, makes the bolt axis of first group of bolt at the horizontal direction of the central shaft of blade.This may provide compacter bolt and arrange, and the adjustable end of first group and second group bolt is contiguous to be arranged each other, but in orthogonal direction effect.
Connect protrusion and can comprise splice sleeve, or multiple protruding part.Equally, connecting that protrude can be one-body molded with the pitching end of inner blade section, or can be at least one independently element, and this element to be contained in the main body of blade sections (such as, it can comprise expandable anchor pole element, with by least one independently element be fixed to blade sections).
In further feature, aerodynamics shell or air guide sleeve can be set around pitching connection bit, to reduce the aerodynamic loss caused due to the discontinuous portion and bolt connection part etc. between taper fragment, blades adjacent section.
A kind of partial pitch wind turbine is also provided, comprises the partial pitch wind turbine blade according to any creationary embodiment described above.This wind turbine can comprise wind turbine tower, is located at the cabin of tower top, is located at the rotor hub at cabin place and at least two partial pitch wind turbine blades be located on rotor hub.This turbo machine is on the bank or offshore turbo machine.
Accompanying drawing explanation
Embodiment of the present invention will be described now, by means of only the mode of citing, and reference correspondingly accompanying drawing, wherein:
Fig. 1 is the cross-sectional view of the amplification of a part for the pitching connection bit coupling of prior art;
Fig. 2 is the stereogram of double-leaf partial pitch wind turbine;
Fig. 3 is the cross-sectional view of the amplification of pitching connection bit coupling according to the first embodiment of the present invention;
Fig. 4 (a) and Fig. 4 (b) illustrates the cross-sectional view of the amplification of the pitching connection bit coupling of two types according to a second embodiment of the present invention; With
Fig. 5 is the cross-sectional view of the amplification of pitching connection bit coupling according to the third embodiment of the invention.
Embodiment
See Fig. 2, partial pitch two-blade wind turbine represents with 10 generally.Wind turbine 10 comprises wind turbine tower 12, is located at the cabin 14 at pylon 12 top, is located at the rotor hub 16 at cabin 14 place.First and second partial pitch rotor blades 18,20 are located at the relative both sides of rotor hub 16.In Fig. 2, illustrate that pylon 12 is located on wind turbine matrix 22, this matrix 22 can comprise any suitable wind turbine foundation.Be understandable that, although the embodiment illustrated describes the present invention for wind turbine on the bank, the present invention can be applicable to the wind turbine in offshore environment equally.
First and second partial pitch rotor blades 18,20 comprise blade body separately, and this blade body has the root end 18a, 20a and distal tip 18b, the 20b that are installed on rotor hub 16.Rotor blade 18,20 comprise respectively and are located at root end 18a, the inner blade section 24,26 of 20a and be located at distal tip 18b, the siphonal lobe fragment 28,30 of 20b.Rotor blade 18,20 comprise system for rotating (not shown in Fig. 2) further, this system for rotating and inner blade section 24,26 and siphonal lobe fragment 28, and each blade contact at the connection bit place between 30 is arranged.
System for rotating is used for relative to inner blade section 24,26 pitching siphonal lobe fragments 28,30.In Fig. 2, the non-pitching of rotor blade 18 (namely, siphonal lobe fragment 28,30 is with the propeller pitch angle pitching of 0 degree) is shown.Be understandable that, inner blade section 24,26 and siphonal lobe fragment 28,30 comprise the terminal fragment of circular, to connect corresponding circular system for rotating.
See Fig. 3, first embodiment of pitching connection bit coupling, it is located at the connection bit place between inner blade section 24 (or 26) and siphonal lobe fragment 28 (or 30), this pitching connection bit coupling represents (in Fig. 3 with 100 generally, the coupling illustrated is for inside and outside blade sections 24a, 28a).In this embodiment, the pitching end (representing with 102) of inner blade section 24a comprises inward flange or shoulder 104, and its inner circumference around pitching end 102 extends, and has outside end face 103.Flange 104 presents inner bearing surface 106, and it is located at the inside of blade body.Limit a series of blind hole (profile represents with 108) in inward flange 104, blind hole 108 is opened on inner bearing surface 106.First group of multiple bolt 110 is fixedly placed in blind hole 108, and the free threaded end 110a of first group of multiple bolt 110 protrudes from inner bearing surface 106, completely to the inside of inner blade section 24a.
In siphonal lobe fragment 28a, in the end face 115 of the pitching end (representing with 114) of this fragment, further define a succession of blind hole 112.Second group of multiple bolt 116 is placed in blind hole 112 regularly.The free threaded end 116a of second group of multiple bolt 116 protrudes from the pitching end face 115 of siphonal lobe fragment 28a completely.
Pitching connection bit coupling 100 comprises system for rotating 118 further, and this system for rotating 118 comprises pitching ring 122 in the first outer pitching ring 120 and second of being linked together by least one bearing runway 124.First and second pitching rings 120,122 are concentric, and the first outer pitching ring 120 has the diameter that in than second, pitching ring 122 is large.In second, pitching ring 122 for rotating or pitching in the diameter of the first outer pitching ring 120.First and second pitching rings 120,122 are provided with a succession of hole (not shown), connect multiple bolt for installing.
System for rotating 118 is set, make the outer dia of outer pitching ring 120 roughly equal without lip diameter with the inside of the inner blade section 24a of contiguous pitching end 102, and inner flange 104 is set to, extend from the inside of inner blade section 24a without ledge surface, flange 104 is made to present round structure at pitching end 102, corresponding to the profile of the first outer pitching ring 106.Therefore, inner flange 104 extends from the interior surface of inner blade section 24a, presents opening at the pitching end 102 of inner blade section 24a, has the diameter less than the first outer pitching ring 120.
System for rotating 118 is set, first pitching ring 120 is connected with first group of multiple bolt 110, pitching end surface 106 place of inner blade section 24a is located at by this first group multiple bolt 110, and make the second pitching ring 122 connect with second group of multiple bolt 116, pitching end surface 115 place of siphonal lobe fragment 28a is located at by this second group multiple bolt 116.
Opening diameter due to pitching end 102 place of inner blade section is less than the outer diameter of system for rotating 118, if system for rotating 118 is set to single single device, this involves and is upwards transmitted by this system for rotating, through the inside of inner blade section 24a, enter the position of the inner bearing surface 106 at pitching end 102 place against inner blade section 24a.Alternately, if system for rotating 118 can be provided with at least two parts for assembling, then can transmit through the pitching end 102 opened by fragment, make system for rotating 118 in the positioned internal of inner blade section 24a, then re-assembly in the inside of inner blade section 24a.
Once system for rotating 118 in position with bolt 110,116 connect, first group of multiple nut 126 is located on the free threaded end 110a of first group of multiple bolt 110, and second group of multiple nut 128 is located on the free threaded end 116a of second group of multiple bolt 116.First group of nut 126 can be fastening against the first pitching ring 120, fastening against inner bearing surface 106 subsequently, and second group of nut 128 can be fastening against the second pitching ring 122, and the pitching end surface 115 subsequently against siphonal lobe fragment 28a is fastening.System for rotating 118 is fixed against inner blade section 24a and siphonal lobe fragment 28a by this, makes blade sections can pitching relative to each other.
Located by the flange 104 at pitching end 102 place by inner blade section 24a, inner bearing surface 106 is presented on the inside of blade, first group of nut 126 and corresponding bolt 110 can fastening against inner bearing surface 106 (namely, by the first pitching ring 120 against surface 106 clamping).Because this tightening action can carry out from blade interior, therefore, do not need the fastening housekeeping operation of the relative complex of carrying out from blade exterior, and the maintenance cost of corresponding blade reduces.Second group of nut 128 can fastening against the interior surface of the pitching end surface 115 of outer leafs section 28a (that is to say, by the second pitching ring 122 against surface 115 clamping).Alternately, bolt/nut combination can have the bolt with bolt head to replace, and this bolt can rotate from blade interior, although this embodiment is out of favour usually.
Although the embodiment shown in Fig. 3 have employed the blind hole 108 be located on the inner bearing surface 106 of inner flange 104, be understandable that, also can adopt other mode of executions.Such as, in inner flange 104, limit a succession of penetration hole, this penetration hole extends to the outside end face 103 of flange 104 from inner bearing surface 106, and this outside end face 103 is located at pitching end 102 place of inner blade section 24a.In this embodiment, bolt 110 shown in Fig. 3 can substitute with multiple bolt with bolt head and threaded free end, these bolts are arranged in penetration hole, bolt head is made to be located at blade exterior, outside end face 103 against flange 104 acts on, this outside end face 103 is located at pitching end 102 place of inner blade section 24a, and makes screw thread free terminal be arranged on blade interior, as shown in the free terminal 110a of bolt in Fig. 3 110.Therefore, the nut in this embodiment also can be fastening against the inner bearing surface 106 of flange 104, to allow to carry out necessary tightening operation from blade interior.In this case, preferably, bolt head against outer surface self-retaining, thus does not need to carry out tightening operation from blade exterior.
Fig. 4 (a) and 4 (b) illustrate selectable embodiment, use penetration hole to substitute blind hole in the flange.By using penetration hole, system for rotating 118 can be mounted to the outside end face 103 of flange 104, this outside end face 103 is located at pitching end 102 place of inner blade section 24a, that is to say, when carrying out tightening operation on the nut being positioned at inside, the first outer pitching ring 120 is clamping between the bolt head and the outside end face 103 of flange 104 of the one group of bolt used effectively.This structure means, system for rotating 118 does not need to be conveyed through inner blade section 24a from blade root, and to be positioned at mounting point, this is an advantage.
In the embodiment of Fig. 4 (a), pitching connection bit coupling, be located at the connection bit place between inner blade section 24 (or 26) and siphonal lobe fragment 28 (or 30), represent (in Fig. 4 (a) with 200 generally, the coupling illustrated is for inside and outside blade sections 24b, 28b).In this pitching connection bit coupling 200, inner blade section 24b comes to a point or narrows to the pitching end (representing with 202) of relatively narrow inner blade section 24b, and pitching end 202 presents the planar end face 206 of inner blade section 24b.The inner blade section 24b at pitching terminal part place comes to a point or the inner bearing surface 208 of the inner blade section 24b presenting inclination that narrows.Pitching end 202 place of inner blade section 24b defines multiple penetration hole 210, and hole 201 extends to the inner bearing surface 208 of inclination from planar end face 206.
In the embodiment of Fig. 4 (a), the pitching end (representing with 214) of siphonal lobe fragment 28b blade sections 28b outside comes to a point or narrows, form relatively narrow pitching end 214, this pitching end 214 has planar end face 217, and this surface 217 has the diameter less than the pitching end 202 of inner blade section 24b.
In siphonal lobe fragment 28b, in the end surface 217 of the pitching end 214 of fragment 28b, define a succession of blind hole 212.First group of multiple bolt 216 is fixedly set in blind hole 212, and the free threaded end 216a of second group of multiple bolt 216 protrudes from the pitching end 214 of siphonal lobe fragment 28b completely.
Pitching connection bit coupling 200 comprises system for rotating 218 further, and system for rotating 218 comprises pitching ring 222 in the first outer pitching ring 220 and second of being linked together by least one bearing runway 224.First and second pitching rings 220,222 are concentric, and the first outer pitching ring 220 has the diameter that in than second, pitching ring 222 is larger.In second, pitching ring 222 for rotating or pitching in the diameter of the first outer pitching ring 220.First and second pitching rings 220,222 are provided with a succession of hole (not shown), for connecting multiple construction bolt.
System for rotating 218 is set, make the first outer pitching ring 220 have the diameter roughly equal with the diameter of the relative narrow pitching end 202 of inner blade section 24b, make the outer pitching ring 220 of system for rotating 218 and planar end face 206 positioned in alignment of inner blade section 24b.System for rotating 218 is set further, make pitching ring 222 in second have the diameter roughly equal with the diameter of the pitching end 214 of inner blade section 28b, make end surface 217 positioned in alignment of the interior pitching ring of system for rotating 218 and the pitching end 214 of siphonal lobe fragment 28b.
System for rotating 218 is set, end surface 217, the second pitching ring 222 of pitching end 214 of the contiguous siphonal lobe fragment 28b of pitching ring 222 in second is connected with first group of multiple bolt 216 of siphonal lobe fragment 28b.Arrange system for rotating 218 further, make the smooth end surface 206 of the contiguous inner blade section 24b of the first outer pitching ring 220, wherein, the multiple hole be limited on the first outer pitching ring 220 is aimed at the multiple penetration holes 210 be limited in end surface 206.
The bolt 226 of multiple headed is set, extends through and be multiplely limited to hole on the first outer pitching ring 220 and multiple penetration hole 210 be limited in end surface 206.Arrange bolt 226, make the first outer pitching ring 220 of the contiguous system for rotating 218 of the head end 226a of bolt, the free threaded end 226b of bolt 226 extends into the inside of inner blade section 24b.
In order to provide smooth inner bearing surface, so that the bolt 226 of multiple headed is fixed on appropriate position, coupling comprises bolt sleeve 228 further, is located at the inside of inner blade section 24b.Bolt sleeve 228 comprises the circular casing main body of the cross section with approximate wedge shape, presents the first inclined surface 230 and a pair plat surface 232,234.A succession of penetration hole 236 extends from inclined surface 230, before bolt sleeve 228 to plat surface 232.
Holding down bolt sleeve pipe 228, make the inner bearing surface 208 of the contiguous inner blade section of the first inclined surface 230 of bolt sleeve 228, wherein, align with multiple penetration hole 210 be limited in the end surface 206 of inner blade section 24b in the hole 236 of bolt sleeve 228.Therefore, the bolt 226 of headed extends through the hole 236 of bolt sleeve 228, and the free screw tip 226b of bolt 226 is protruded from the first plat surface 232 of bolt sleeve 228 completely.
In order to fixedpiston system coupling 220, first group of multiple nut 237 is located on the free threaded end 216a of first group of multiple bolt 216, second group of multiple nut 238 is located on the free threaded end 226b of the bolt 226 of multiple headed.First group of nut 237 can be fastening against pitching ring 222 in second, and the end surface 217 subsequently against the pitching end 214 of siphonal lobe fragment 28b is fastening, thus fixes the second pitching ring 222 against end surface 217.
Similarly, second group of nut 238 can be fastening against the first plat surface 232 of bolt sleeve 228, and this is that the bolt 226 of headed provides smooth inner bearing surface.Against the fastening second group of nut 238 of bolt sleeve 228, can be fastening against the inner bearing surface 208 of the inclination of inner blade section 24b by sleeve pipe 228, clamping force is shifted by structure subsequently, make tightening nut for the head end 226a of bolt 226 is fastening against the first outer pitching ring 220, the planar end face 206 of pitching ring 220 against pitching end 202 place of inner blade section 24b is clamped.
Like this system for rotating 218 is fixed against inner blade section 24b and siphonal lobe fragment 28b, make blade sections relative to each other pitching.Because the inner bearing surface 208 tilted presents difficult surfaces (difficult surface), effectively by nut against fastening, the use of wedge bolt sleeve pipe 228 provides smooth bearing surface on the inside of inner blade section 24b, against this bearing surface clamping bolt 226.This makes the inside of system for rotating coupling 200 fastening conversely, does not need the fastening housekeeping operation carrying out relative complex from blade exterior.
In order to reduce the aerodynamic loss in system for rotating coupling 200 region, at least one shell or aerodynamics air guide sleeve 240 are set at pitching connection bit place, this shell is set, to cover the inside and outside blade sections 24b of point relatively, the pitching end 202,214 of 28b.Shell 240 can be set to two sections---first paragraph is used for the pitching end 202 of inner blade section 24b, second segment be used for siphonal lobe fragment 28b pitching end 214---make when siphonal lobe fragment 28b is relative to inner blade section 24b pitching, shell mechanism 240 can pitching.Shell 240 is shaped to, and provides coherent aerodynamic blade profile in pitching connection bit, to prevent the eddy current that occurs due to the shape of system for rotating coupling 200 or most advanced and sophisticated loss.
Be understandable that, other system for rotating connected piece structures can be used.Such as, with reference to figure 4 (b), alternative system for rotating coupling represents with 201, is arranged between inner blade section 24b and siphonal lobe fragment 28c.(in order to simplify, the assembly of the system for rotating coupling 201 of the Fig. 4 (b) be equal to the assembly of the system for rotating coupling 200 of Fig. 4 (a), with identical label, and does not do in the present embodiment and describes especially.) Fig. 4 (b) example in, siphonal lobe fragment 28c does not comprise the relatively narrow pitching end 214 as Fig. 4 (a).Just the opposite, siphonal lobe fragment 28c does not roughly come to a point at pitching end, and comprises pitching end 215, and this pitching end 215 has the diameter identical with pitching ring 222 in second of system for rotating 218.This structure causes having relatively large jump portion and discontinuity between the aerodynamic profile of the aerodynamic profile of inner blade section 24 and siphonal lobe fragment 28c.
In this structure, blade can comprise shell or air guide sleeve 240a, and for the space between bridge joint two blade profiles, the blade for the whole length in pitching connection bit region provides relatively coherent aerodynamic blade profile.
See Fig. 5, the further selectable embodiment of the present invention is shown.Be located at the pitching connection bit coupling of the connection bit between inner blade section 24 (or 26) and siphonal lobe fragment 28 (or 30), totally represent with 300.(in Fig. 5, the coupling illustrated is relevant with inside and outside blade sections 24d, 28d).In this embodiment of pitching connection bit coupling 300, inside and outside blade sections 24d, the 28d at pitching connection bit place do not come to a point, and the pitching end 302 of inner blade section 24d has the diameter relatively larger than the pitching end 304 of siphonal lobe fragment 28d.
Define first group of multiple blind hole 306 in the end surface 303 of the pitching end 302 of inner blade section 24d, in the end surface 305 of the pitching end 304 of siphonal lobe fragment 28d, define second group of multiple blind hole 308.
Multiple connection anchor pole 310 is fixedly set in first group of multiple blind hole 306, and these blind holes 306 are located on the end surface 303 of the pitching end 302 of inner blade section 24b.Anchor pole 310 comprises the free terminal 310a protruded from the end surface 303 of pitching end 302, each anchor pole 310 has the penetration hole (not shown in Fig. 5) be limited in the free terminal 310a of anchor pole 310, and the opening of each penetration hole is towards the center longitudinal axis of inner blade section 24d.
Multiple bolt 312 is fixedly set in second group of multiple blind hole 308, these blind holes 308 are located on the end surface 303 of the pitching end 302 of inner blade section 24d, and the free threaded end 312a of multiple bolt 312 protrudes from the surface 305 of the pitching end 304 of siphonal lobe fragment 28d completely.
Pitching connection bit coupling 300 comprises system for rotating 314 further, and this system for rotating 314 comprises pitching ring 318 in the first outer pitching ring 316 and second of being linked together by least one bearing runway 320.First and second pitching rings 316,318 are concentric, and the first outer pitching ring 316 has the diameter that in than second, pitching ring 318 is larger.In second, pitching ring 318 for rotating or pitching in the diameter of the first outer pitching ring 316.
Second pitching ring 318 is provided with a succession of penetration hole (not shown), for connecting with multiple construction bolt.
System for rotating 314 comprises the circular bolt sleeve or the flange 322 that are protruding to the first end 322a from the first pitching ring 316 further, bolt sleeve 322 has internal surface 324 and outer surface 326, this internal surface 324 faces the direction of the center longitudinal axis through system for rotating 314 center, and this outer surface 326 faces the direction away from center longitudinal axis.
The end surface of the free terminal 322a of bolt sleeve 322 defines a succession of blind hole 328, bolt sleeve 322 comprises corresponding a succession of penetration hole 330 further, this penetration hole 330 extends to internal surface 324 from outer surface 326, and penetration hole 330 is orthogonal to blind hole 328.Penetration hole 330 is set, makes each penetration hole 330 crossing with a blind hole 328.
System for rotating 314 is set, makes the first outer pitching ring 316 and bolt sleeve 322 have the diameter roughly equal with the diameter of the pitching end 302 of inner blade section 24d.Therefore, can the align end surface 303 of pitching end 302 of inner blade section 24d of the free terminal 322a of bolt sleeve 322 is located, and the free terminal 310a connecting anchor pole 310 is contained in blind hole 328, and this blind hole 328 is located on bolt sleeve 322.
System for rotating 314 is set further, pitching ring 318 in second is made to have the diameter roughly equal with the diameter of the pitching end 304 of siphonal lobe fragment 28d, can the align end surface 305 of pitching end 304 of siphonal lobe fragment 28d of the interior pitching ring 318 of system for rotating 314 is located, from the free terminal 312a of the bolt 312 that the pitching end 304 of siphonal lobe fragment 28d protrudes, extend through the hole be located in second on pitching ring 318.
Multiple nut 332 is applied to the free threaded end 312a of second group of multiple bolt 312, and in nut 332 against second, pitching ring 318 is fastening, so that system for rotating 314 is fixed to siphonal lobe fragment 28d.
In order to system for rotating 314 is fixed to inner blade section 24d, the bolt of a succession of headed 334 through the penetration hole 330 of bolt sleeve 322, bolt 334 be located at connect anchor pole 310 free terminal 310a in hole connect.The bolt 334 of headed comprises head end 334a and free threaded end 334b.Bolt 334 is set to, and makes head end 334a be supported on the outer surface of bolt sleeve 322, and free threaded end 334b protrudes from the internal surface 324 of bolt sleeve 322 completely.
A succession of nut 336 is located on the free threaded end 334b of bolt 334, and nut 336 is fastening for the internal surface 324 against bolt sleeve 322.Against internal surface 324 tightening nut 336, for bolt 334 being fixed on the appropriate position on bolt sleeve 322, because bolt 334 is crossing with the connection anchor pole 310 protruded from inner blade section 24d, first of system for rotating 314 the outer pitching ring 316 is fixed to the pitching end 302 of inner blade section 24d by conversely.
Because the bolt 334 be located in bolt sleeve 322 is roughly orthogonal with the bolt 312 in the pitching end 304 being located at siphonal lobe fragment 28d, cause the connection of cross bolt type, be applied to and often organize bolt 334, the nut 336 of 312,332 can be fastening against inner bearing face (namely, respectively against the internal surface 324 of bolt sleeve 322; And second the end surface 305 of pitching end 304 of pitching ring 318 and siphonal lobe fragment 28d fastening).In this mode, system for rotating 314 being fixed to inside and outside blade sections 24d, 28d bolt 312,334 can be fastening from blade interior, provides more efficient and more economical housekeeping operation.Especially, bolt 334 can be tapered, makes the fastening conical section of bolt 334 that pulls of nut 336 through the penetration hole (not shown) be limited in the free terminal 310a of anchor pole 310, thus pull inner blade section 24d towards bolt sleeve 322.
Be understandable that, embodiment as in the previous, coupling also can comprise the suitable shell or air guide sleeve 338 of being located at pitching connection bit place, to provide the transition of relative smooth in the blade aeromechanical profile from inner blade section 24d to siphonal lobe fragment 28d.
Be understandable that, the change of the present embodiment can be predicted, and such as, connecting anchor pole 310 can be substituted by single single splice sleeve, this splice sleeve extends around the circumference of the pitching end 302 of inner blade section 24d, and splice sleeve is placed in the respective channel limited around bolt sleeve 322 circumference.Additionally or selectively, although the embodiment of Fig. 5 illustrates that connecting anchor pole 310 is placed in the hole 322 in the main body being located at bolt sleeve 328, be understandable that, bolt sleeve 322 can set size, the outside connecting the circumferential edges that anchor pole 310 limits is centered around with coupling, or in this circumference, or anchor pole 310 can set size, so that at least one being located on the end surface 322a of sleeve pipe 322 is protruded, be placed in the suitable passage be limited on anchor pole 310.
An advantage of the present embodiment is, owing to improving system for rotating, addition of bolt sleeve, can apply Novel connected connection technology, and not need to do substantial amendment to existing blade design.Further, although bolt sleeve can be set to the integral part of system for rotating, be understandable that, by suitable bolt sleeve being attached at least one pitching ring of system for rotating, can relatively simply improve existing system for rotating.
Being suitable for of the pitching coupling fragment of partial pitch wind turbine blade, for the bolt connecting fragment provides the first and second inner bearing surface, makes bolt fastening from the inside of blade.Outside tightening operation that this does not need relative complex, that regularly carry out, reduces and relates to the workload that partial pitch wind turbine is safeguarded and the cost of being correlated with.
The invention is not restricted to embodiment described herein, can revise without departing from the scope of the present invention and be suitable for.
Below, some embodiments describe with the various situations of interdependence.
Situation:
Situation 1, at least 35 meters long, the partial pitch wind turbine blade with general hollow main body, this blade comprises:
Have the system for rotating of the first and second pitching rings, described second pitching ring can rotate relative to described first pitching ring;
Have the inner blade section of root end and pitching end, the pitching end of described inner blade section passes through the first pitching ring of first group of multiple Bolt Connection to described system for rotating; With
Have pitching end and most advanced and sophisticated siphonal lobe fragment, the pitching end of described siphonal lobe fragment is by second group of multiple Bolt Connection to the second pitching ring of described system for rotating, and described siphonal lobe fragment can relative to described inner blade section pitching,
Wherein, described blade presents the clutch shaft bearing surface and the second bearing surface of being located at described blade sections body interior, described blade is set, first end of the first end of described first group of multiple bolt and described second group of multiple bolt can be accessed from the inside of described wind turbine blade, wherein, described first group of multiple bolt can be fastening against described clutch shaft bearing surface, described second group of multiple bolt can be fastening against described second bearing surface, makes described first and second groups of multiple bolts can be fastening from wind turbine blade body interior.
Situation 2, blade as described in situation 1, wherein, the pitching end of described inner blade section is shaped to, and present described clutch shaft bearing surface, described first group of multiple bolt can be fastening against this clutch shaft bearing surface.
Situation 3, blade as described in situation 2, wherein, described inner blade section comprises the inward flange of the pitching tail end being located at described inner blade section, and wherein, the first pitching ring of described system for rotating is bolted to described inward flange.
Situation 4, blade as described in situation 3, wherein, described blade comprises multiple blind hole be located in described inward flange, described blind hole extends in the wind turbine blade main body of described flange from the inner bearing surface of described inward flange, described first group of multiple bolt extends through described first pitching ring and enters described blind hole, wherein, described first group of multiple bolt is used for fastening against described first pitching ring, described first pitching ring to be fixed to the inner bearing surface of described inward flange.
Situation 5, blade as described in situation 3, wherein, described blade comprises multiple penetration hole be located in described inward flange, described penetration hole extends to the outer surface of described inward flange from the inner bearing surface of described inward flange, wherein, described first group of multiple bolt extends through the penetration hole of described inward flange and described first pitching ring, so that described first pitching ring is mounted to described inward flange, make the end of described first group of multiple bolt can be fastening against the inner bearing surface of described inward flange, so that described first pitching ring is fixed to described inward flange.
Situation 6, blade as described in situation 2, wherein, described inner blade section comes to a point in described pitching tail end, to provide the inwall of inclination in described pitching tail end, wherein, described first pitching ring is mounted to the end surface of the wind turbine blade main body of general hollow in the pitching tail end of described inner blade section, wherein, described first group of multiple bolt is applicable to, fastening against described tilt internal wall.
Situation 7, blade as described in situation 6, wherein, described blade comprises bolt sleeve further, and described bolt sleeve has the cross section of approximate wedge shape, and this wedge-shaped cross-section has inclined surface, wherein, the inclined surface of described bolt sleeve is applicable to, the tilt internal wall of the pitching end of contiguous described inner blade section, wherein, described bolt sleeve presents smooth inner bearing surface, and the end of described first group of multiple bolt can be fastening against this inner bearing surface.
Situation 8, blade as described in situation 1, wherein, described system for rotating comprises the circular bolt sleeve protruded from described first pitching ring, described circular bolt sleeve is applicable to, connect with the pitching end of described inner blade section, wherein said circular bolt sleeve presents inside pipe casing bearing surface, arranges described first group of multiple bolt, with fastening against described inside pipe casing bearing surface, described first pitching ring to be fixed to the pitching end of described inner blade section.
Situation 9, blade as described in situation 8, wherein, at least one connection that described blade comprises the pitching tail end being located at described inner blade section is protruded, described circular bolt sleeve is set to, and connects to protrude to connect with at least one, wherein, described first group of multiple bolt is set, to extend through described circular bolt sleeve and at least one connection protrusion described, form bolt and connect, described first pitching ring to be fixed to the pitching end of described inner blade section.
Situation 10, partial pitch wind turbine, the partial pitch wind turbine blade of described any situation before comprising.

Claims (11)

1. one kind at the partial pitch wind turbine blade (18 of at least 35 meters long, 20) method of system for rotating is installed in, described blade (18, 20) there is the blade body of general hollow, this blade body has inner blade section (24, 26) and siphonal lobe fragment (28, 30), in described inner blade section (24, 26) and siphonal lobe fragment (28, 30) system for rotating is provided with between, this system for rotating is used for relative to described inner blade section (24, 26) siphonal lobe fragment (28 described in pitching, 30), it is characterized in that, wherein, described system for rotating comprises the first pitching ring (120) and the second pitching ring (122), described second pitching ring (122) can relative to described first pitching ring (120) pitching,
Wherein, described blade comprises the inner blade section (24,26) with root end (18a, 20a) and the first pitching end (102); Described first pitching end (102) is arranged by first group of multiple fastening piece (110,126) and is used for being attached to the first pitching ring (120); Described first group of multiple fastening piece (110,126) have for fixing described first group of multiple fastening piece (110,126) first device (126), described first device (126) is set, makes the fixing of described first device (126) that the first pitching end (102) is fastened to the first pitching ring (120); And,
Wherein, blade comprises the siphonal lobe fragment (28,30) with the second pitching end (114) and most advanced and sophisticated (18b, 20b) further; Second pitching end (114) arranges the second pitching ring (122) for being attached to described system for rotating by second group of multiple fastening piece (116,128); Described second group of multiple fastening piece (116,128) have for fixing described second group of multiple fastening piece (116,128) the second device (128), described second device (128) is set, makes the fixing of described second device (128) that the second pitching end (114) is fastened to the first pitching ring (122); Wherein, the second device (128) only accesses from the inside of described wind turbine blade (18,20);
Wherein, by rotating described second pitching ring (122) relative to described first pitching ring (120), described siphonal lobe fragment (28,30) can relative to inner blade section (24,26) pitching;
Described method comprises described inner blade section (24,26) and outer leafs fragment (28,30) is fastened to described system for rotating; Described fastening completing comprises by only from described wind turbine blade (18,20) described second device (126) is fixed in inside, and described second pitching end (114) is fastened to described second pitching ring (122); And by only fixing described first device (116) from the inside of described wind turbine blade (18,20), described first pitching end (102) is fastened to described first pitching ring (120).
2. method according to claim 1, it is characterized in that, described first pitching end (102) comprises described inner blade section (24,26) the clutch shaft bearing surface (106) on inside, wherein, described method comprises by described clutch shaft bearing surface (106) near described first pitching ring (120), and by the fixing fastening described clutch shaft bearing surface (106) of described first device (126).
3. method according to claim 2, it is characterized in that, described first group of multiple fastening piece (110,126) comprises the first bolt (110) and the first nut (126), wherein, described first device is described first nut (126); Wherein, described first bolt (110) extends through described first pitching ring (120), and enters described first pitching end (102); And wherein, described first device (126) and described clutch shaft bearing surface (106) are located at the relative both sides of described first pitching ring (120), for clamping described first pitching ring (120) against described clutch shaft bearing surface (106).
4. method according to claim 1, it is characterized in that, described first group of multiple fastening piece (110,126) comprises the first bolt (110) and the first nut (126), wherein, described first device is the first nut (126); Wherein, described second group of multiple fastening piece (116,128) the second bolt (116) and the second nut (128) is comprised, and wherein, described second device is the second nut (128), wherein, described first device (126) and fixedly comprising of the second device (128) fastening first nut and the second nut is distinguished.
5. the partial pitch wind turbine blade (18,20) of at least 35 meters long, for the method for basis before described in arbitrary claim, described blade (18,20) has the blade body of general hollow, and described blade comprises:
Have the system for rotating of the first pitching ring (120) and the second pitching ring (122), described second pitching ring (122) can rotate relative to described first pitching ring (120);
There is the inner blade section (24,26) of root end (18a, 20a) and the first pitching end (102); First pitching end (102) of described inner blade section (24,26) is attached to the first pitching ring (120) of described system for rotating by first group of multiple fastening piece (110,126); Described first group of multiple fastening piece (110,126) have for fixing described first group of multiple fastening piece (110,126) first device (126), described first device (126) is set, make the fixing of described first device (126) that described inner blade section (24,26) is fastened to described first pitching ring (120); With
There is the second pitching end (114) and most advanced and sophisticated (18b, siphonal lobe fragment (28 20b), 30), described siphonal lobe fragment (28,30) the second pitching end (114) is attached to the second pitching ring (122) of described system for rotating by second group of multiple fastening piece (116,128); Described second group of multiple fastening piece (116,128) have for fixing described second group of fastening piece (116,128) the second device (128), described second device (128) is set, make the fixing of described second device (128) that described inner blade section (24,26) is fastened to described second pitching ring (122); Wherein, described second device (128) is only accessed from the inside of described wind turbine blade (18,20);
Wherein, by rotating described second pitching ring (122) relative to described first pitching ring (120), described siphonal lobe fragment (28,30) can relative to described inner blade section (24,26) pitching;
It is characterized in that, described blade is set to, by means of only fixing described first device (126), by described inner blade section (24,26) described first pitching ring (120) is fastened to, wherein, described first device (126) only accesses from the inside of described wind turbine blade (18,20).
6. blade according to claim 5, it is characterized in that, described first pitching end (102) comprises described inner blade section (24,26) the clutch shaft bearing surface (106) on inside, wherein, the contiguous described first pitching ring (120) of described clutch shaft bearing surface (106), and by described first group of multiple fastening piece (110,126), described clutch shaft bearing surface (106) is secured to described first pitching ring (120).
7. blade according to claim 6, it is characterized in that, described first pitching end (102) has inward flange (104), described inward flange (104) comprises clutch shaft bearing surface (106), wherein, by first group of multiple fastening piece (110,116), the first pitching ring (120) of described system for rotating is fastened to the clutch shaft bearing surface (106) of described inward flange (104).
8. blade according to claim 6, is characterized in that, described clutch shaft bearing surface (106) is orthogonal to the longitudinal axis of described inner blade section (24,26).
9., according to the blade described in claim 6,7 or 8, it is characterized in that, described first group of multiple fastening piece (110,126) comprise the first bolt (110) and the first nut (126), wherein, described first device is the first nut (126); Wherein, described first bolt (110) extends through described first pitching ring (120), and enters described first pitching end (102); Wherein, described first device (126) and described clutch shaft bearing surface (106) are arranged on the relative both sides of described first pitching ring (120), for clamping described first pitching ring (120) against described clutch shaft bearing surface (106).
10. blade according to claim 7, it is characterized in that, described first group of multiple fastening piece (110,126) comprises the first bolt (110) and the first nut (126), wherein, described first device is the first nut (126); Wherein, described first device (126) and described clutch shaft bearing surface (106) are arranged on the relative both sides of described first pitching ring (120), for clamping described first pitching ring (120) against described clutch shaft bearing surface (106); Wherein, described inward flange (104) comprises multiple blind hole (108), this blind hole (108) extends into the wind turbine blade main body of described inward flange (104) from the clutch shaft bearing surface (106) of described inward flange (104), wherein, described first bolt (110) extends through described first pitching ring (120), enters described blind hole (108).
11. blades according to claim 5, it is characterized in that, described first group of multiple fastening piece (110,126) comprises the first bolt (110) and the first nut (126), wherein, described first device is described first nut (126); Wherein said second group of multiple fastening piece (116,128) comprises the second bolt (116) and the second nut (128), and wherein, described second device is described second nut (128).
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US9051917B2 (en) 2015-06-09
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EP2535559A3 (en) 2013-08-14
CA2779321A1 (en) 2012-12-15
DK177296B1 (en) 2012-10-15

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